sudo ./install
o Add a file called phalcon.ini in /etc/php.d/ with this content: extension=phalcon.so
o Put back the original etc/yum.conf file
o Restart server.

Before I rebooted the server, "Apache is functioning normally" was displayed when I typed the IP address in my browser. Now when I got there, I get a browser message about being unable to establish a connection. When I type :2222 after the ip address, I can get access to directadmin.

What did I do wrong? (this is the second time I tried to reinstall it completely...)

Thanks for your support :) I think something goes wrong when I install php-devel, so I'll head to a centos forum to ask what might go wrong there (I rebooted after each step to figure out when it would stop saying apache is working). I'll have to figure out that error first before I can continue the Phalcon installation.